Hi, its a freshwater pipefish, i am not very sure of the exact species. It needs small enough live food as it is rather fussy eater, which will be rather troublesome. You can try live daphnia, live brine shrimp or baby brine shrimp, shrimplets or fish fry.
The article below might be of help
http://www.wetwebmedia.com/brackishs...peshorsart.htm
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